Centrifuge Filter Fixation via Radial Clamping Rings
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Solution Overview
Problem
Centrifuges operating at low speeds face challenges in securely fixing filter foils or cloths due to insufficient pretension, leading to potential damage and downtime, as existing solutions relying on protective screens may not provide adequate fixation at lower speeds.
Innovation Solution
Incorporating at least one clamping ring that presses the protective screen radially outward, with internal projections on the protective screen to prevent axial displacement and enhance fixation, ensuring the filter edges are securely held between sealing lips and the drum shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective screen with plug-in closure is used to create pretension, then the filter foil or filter cloth is securely fixed at high speeds, but the pretension becomes insufficient at low speeds leading to loose fixation
Solution Approach 1:
The invention changes the pretension parameter by adding clamping rings that apply additional radial force to the protective screen. This increases the contact pressure between the protective screen and the sealing elements, ensuring sufficient fixation even at low operating speeds where centrifugal force is insufficient.
Solution Approach 2:
The clamping rings apply preliminary radial outward force to the protective screen before operation begins. This preliminary action ensures that the protective screen is already under sufficient tension to maintain secure fixation of the filter foil or filter cloth even when centrifugal force is minimal or zero.
2Reliability
If clamping rings are added to increase pretension, then fixation is improved at low speeds, but the device complexity increases
Solution Approach 1:
Rather than complicating the entire protective screen structure, the invention applies clamping rings only at specific locations where additional pretension is needed. The projections are provided only at the ends of the protective screen, creating local reinforcement without requiring complete structural redesign.
Solution Approach 2:
The protective screen is segmented into sections with and without projections, allowing the clamping rings to be positioned only where needed for additional pretension. This segmentation enables selective reinforcement without adding complexity to the entire device structure.
3Productivity
If the scraper or knife is moved close to the filter cloth for complete solid removal, then productivity increases, but the filter cloth may be damaged
Solution Approach 1:
The protective screen acts as an intermediary element between the scraper or knife and the filter cloth or filter foil. It provides a protective barrier that allows the scraper to operate close to the filter material for complete solid removal while preventing direct contact that could cause damage to the filter cloth.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides enhanced secure fixation of filter foils or cloths across the entire surface, preventing damage and ensuring reliable operation even at low speeds by intensifying the pretension and preventing clamping ring movement, thus maintaining effective contact with the drum shell.
Implementation Method 1
The corresponding pressing effect is intensified by the centrifugal force in the operating state
Implementation Method 2
the protective screen is provided on its inside with at least one projection which fixes the installed clamping ring in the axial direction
Data Source
Figure 1
Figure 2~3
AI summary
The device has a protective strainer (5) and a sealing element (6) with sealing lips. The protective strainer firmly clamps a filter foil or a filter cloth (4) and a support unit, particularly a support strainer (3) between the sealing lips of the sealing element in the installed condition. The device also has a clamping ring (7) which compresses the protective strainer radially outwards in the installed condition. The protective screen is provided at its inner side with a projection (8) which fixes the installed clamping ring in axial direction.